/*
 * Copyright 2002-2012 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.jdbc.object;

import org.springframework.dao.InvalidDataAccessResourceUsageException;
import org.springframework.jdbc.core.RowMapper;
import org.springframework.util.Assert;

import java.util.Map;

public class GenericSqlQuery extends SqlQuery {

    Class rowMapperClass;

    RowMapper rowMapper;

    public void setRowMapperClass(Class rowMapperClass)
            throws IllegalAccessException, InstantiationException {
        this.rowMapperClass = rowMapperClass;
        if (!RowMapper.class.isAssignableFrom(rowMapperClass))
            throw new IllegalStateException("The specified class '" +
                    rowMapperClass.getName() + " is not a sub class of " +
                    "'org.springframework.jdbc.core.RowMapper'");
    }

    @Override
    public void afterPropertiesSet() {
        super.afterPropertiesSet();
        Assert.notNull(rowMapperClass, "The 'rowMapperClass' property is required");
    }

    @Override
    protected RowMapper newRowMapper(Object[] parameters, Map context) {
        try {
            return (RowMapper) rowMapperClass.newInstance();
        } catch (InstantiationException e) {
            throw new InvalidDataAccessResourceUsageException("Unable to instantiate RowMapper", e);
        } catch (IllegalAccessException e) {
            throw new InvalidDataAccessResourceUsageException("Unable to instantiate RowMapper", e);
        }
    }
}
